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Titolo:
The nutritional significance of "dietary fibre" analysis
Autore:
Knudsen, KEB;
Indirizzi:
Danish Inst Agr Sci, Dept Anim Nutr & Physiol, Res Ctr Foulum, DK-8830 Tjele, Denmark Danish Inst Agr Sci Tjele Denmark DK-8830 Foulum, DK-8830 Tjele, Denmark
Titolo Testata:
ANIMAL FEED SCIENCE AND TECHNOLOGY
fascicolo: 1-2, volume: 90, anno: 2001,
pagine: 3 - 20
SICI:
0377-8401(20010315)90:1-2<3:TNSO"F>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
BETA-GLUCANASE SUPPLEMENTATION; BARLEY-BASED DIET; PLANT-CELL WALLS; GASTROINTESTINAL-TRACT; LARGE-INTESTINE; GROWING-PIGS; NONSTARCH POLYSACCHARIDES; OAT FRACTIONS; GUAR GUM; APPARENT DIGESTIBILITY;
Keywords:
dietary fibre; non-starch polysaccharides; pigs; digestive tract; digestibility;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
71
Recensione:
Indirizzi per estratti:
Indirizzo: Knudsen, KEB Danish Inst Agr Sci, Dept Anim Nutr & Physiol, Res Ctr Foulum, POB 50, DK-8830 Tjele, Denmark Danish Inst Agr Sci POB 50 Tjele Denmark DK-8830 le, Denmark
Citazione:
K.E.B. Knudsen, "The nutritional significance of "dietary fibre" analysis", ANIM FEED S, 90(1-2), 2001, pp. 3-20

Abstract

The term "dietary fibre" (DF) is, in most recent animal literature, used for cell wall or storage non-starch polysaccharides (NSP) and lignin. The DFcan be measured as soluble, insoluble and total DF by enzymatic-gravimetric methods or as soluble, insoluble and total NSP by enzymatic-chemical methods and lignin by gravimetry. The NSP comprise 700-900 g kg(-1) of the plant cell wall, with the remaining being lignin, protein, fatty acids, waxes, etc. plant cell wall NSP is a diverse group of molecules with varying degrees of water solubility, size and structure, which may influence the theological properties of the gastrointestinal contents, flow of digesta and the digestion and absorption process to a variable degree. The action of NSP in the stomach and small intestine is essentially a physical one, in which theplant cell either acts as barrier to the release of nutrients or increasesthe viscosity of the liquid phase and restricts their absorption. However,contradictory effects of DF are reported in the literature concerning their effects on gastric emptying and rate of glucose absorption in small intestine presumably due to differences among studies in the form in which the DF has been included (isolates or integrated part of cell wall structure). In pigs, approximately 0.8 of fed NSP is recovered in digesta leaving the ileum; the remaining being lost through microbial degradation in stomach and small intestine. The NSP are degraded to a variable degree in the large intestine by anaerobic fermentation. The degradation of NSP in the large intestine depends on the degree of lignification, solubility and structure of the polysaccharides. Analytical values concerning degree of lignification andwater solubility provide important information about the degradability of NSP in the large intestine, while the effect of NSP on the digestion and absorption processes in the small intestine is more difficult to predict fromany of the chemical parameters currently measured. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 20:07:54